class_docstr: Traitlet class storing a JupyterChart's params
code: def __init__(self, trait_values):
      super().__init__()
  
      for key, value in trait_values.items():
          if isinstance(value, (int, float)):
              traitlet_type = traitlets.Float()
          elif isinstance(value, str):
              traitlet_type = traitlets.Unicode()
          elif isinstance(value, list):
              traitlet_type = traitlets.List()
          elif isinstance(value, dict):
              traitlet_type = traitlets.Dict()
          else:
              traitlet_type = traitlets.Any()
  
          # Add the new trait.
          self.add_traits(**{key: traitlet_type})
  
          # Set the trait's value.
          setattr(self, key, value)
  
imports: import json
  import anywidget
  import traitlets
  import pathlib
  from typing import Any, Set, Optional
  import altair
  from altair.utils._vegafusion_data import using_vegafusion, compile_to_vegafusion_chart_state
  from altair import TopLevelSpec
  from altair.utils.selection import IndexSelection, PointSelection, IntervalSelection
label_desc: Use image node_id 1 to create a new Params object from inherited base classes: traitlets with example: obj = Params(trait_values)